Power-transmitting mechanism



0d 28, 1930. G. c. CARHART y1,780,065

POWER YTRANSMITTING MEGHANISM Filed March 1'7 1926 ATTORNEYS,

Patented Oct.. 28',y 1930 A -f UNSTEDf enormen@ annimmt', oFsYaAcUsEjNEWvo'nK, `ess'ieivon-cro.imovvN-Lrr'n GEAR y COMPANLOEVSYBACUSENEW YORK,'aooRPoneTIoNoE'NEw Yoan 'y PovvER-TRaNsMITrINe menemista *f "jappiieationmeanach17,1926. serialiriasiaY y This invention relates to motion transmit tingmechanisms suchas are used in motor vehielesand hasfv-for'its object a particularly Y* l simple'and'eficient means whereby the shafts,

gearsn'eluteh sections or other rotative parts of a vtransmission'gearing arerelieved of all braking 'forces and all driving forcesy either fromthe engine or from the propeller shaft of the vehicle during gear shifting operations 'and are also free of the centrifugalor fly' Wheel effect frtatablepfarts connected to the drivingfanddriven shafts ofthe gearing,V that lisf' theyf fare neither being :rotated nor held from rotating by brakesl during gearshift- Y Y and in the combinationsand `con`struetions 'f'rhsfivntienl comprises ,generally aff-gear set or transmission gearing ving the' `usual iigfand"y driven shaftsandthe J motion natal-'vivante fidirmfivei'jatf einen; and

enga@ @detail View" shaftl and the remainingrheavy'parts of the ne an@i1nije:p`ro' Y i i v '14:' designates the single plate rotatablewvith Y Y i the shaftfbithaving its hub 15 Vsplined thereiy, 'elearning and driven shafts.y of kthe Vgearing which (are journalled, respectivelyrin bearings inthe front and rearvvalls of the transmission gear case 3, the shaftsrl and `v2 being arranged in axial `alinernent and the sha-ft 2 having a pilot bearing in the rear end ofthe* shaft l.

V5 andi@ lare shiftable gears forminglpart of 'thel motiontransmitting mechanismiwithl in the gear box i between the A'driving and driven shafts. `i f 7 is a lever-for selectingv andshiftingthe gearsV 5,167 this levervcoactingivvith the; usual slide rods having forks 8,v 9 connected to the f gears 5 and 6 respectively; i 4. f y

scription is thought to be unnecessary. v lOYdesignates theprinie mover or fly wheel. v of the engine and ll ,thepropeller shaft driver, the latter being mounted in an auxiliary casing l2 mounted on the rear Wall of the gear case Band havinga pilot bearing on the rearv end of theldriven shaft 2 of the gearing y 13 Vvdesignates the main orfrontclutch as y a Whole, between the prime mover lOan'dthe 75 driving shaft `lof the gearing, this jclutch in- I cluding a comparatively light 11cm-centrifu-v gal member or `sectionrotatable 'with the other section of the Clutch being` rotatable .Wi-th the prime'fmover or fly Wheel lOsothat the centrifugal orfly Wheel efeetofany part of the clutch rotatingwhentheclutch' 13l is 1 disengaged is notefective on the shaft 14 `-In other `Words,"tlie'shaft l-V isY relieved of the centrifugal effect of all heavy rotatingparts `Whiehlmive aflywheel effect;

v rlhe clutch here shown is of the single plate type invvliichv the plate orrlight member is rotatablewith tbeshaft l.' s-

to. The 'remainder of the clutch 'includes an axially shiftable pressure-plate 16, an abut# ment ring' 17,' a throw-out sleeve l18,' ay main y spring 19 rand motiongtransmitting"levers QO-betvjeen thethroW-outsleeve and the presysure ring,Y these leversfuleruminglfon thefv fulcrum ring and falso thrustingagainst'- an As the Construction of .thistypeofV tran's- 65 i VmissionV gearing; is Welleknown, Vfurther de annular' l bearing face `onthepressure ring. ,lfm

mounted Within a hub 21 on the pressure ring and as slidable axially thereof, and as having radially extending shoulders 22 extendingk through slots in the hub 21V and coacting withfthe spring abutment 23. The spring abutment acts on the levers 20. The rear end ofv ythe spring acts against the abutment 24 on therear end of the hub 21 on the pressure ring. l f

The throw-out sleeve has a throwfout bearing 25 at its rear end with `which coacts the fork arms 26 of a yoke 27 mounted on a shaft 28, which in turn is mounted in the clutch casing, the shaft 28 extending to the outside of the clutch casing and having the usual clutch pedal 29 thereon. The construction of the clutch lper sc, forms no part of this invention and it is pertinent only iuso far 8.8 a light non-centrifugal member of the clutch is mounted on the shaft 1 whileall the other heavier parts are rotatable with the Vfiy Wheel so that when the clutch is disengaged there is no yiyy Wheel momentum appliedto the gearing. f

The auxiliary clutch also comprises a nonoentrifugal member` rotatable with the driven Shaft 2 of the gearing yand the section .carrying the remainder of the parts of the clutch is' rotatable with the propeller shaft driver so that when the auxiliary clutch is disengagged, the gearingv is relieved of alllcentrifugil 0r fly wheel effect due to heavy rotating parts connected to the driven shaft of the gearing, and hence the gears quickly come to ia stop as there is no momentum tending toturn them and no braking action is necessary to stop them, and'therefore, the gears aie freey to adjust themselves Without any restraining force on them during gear shifting operations. f

30 designates the rear' clutch asV a whole located in the casing 12. c

31 is the sin le plate member of the clutch, this being a at'ring-with frictiony facings 0n opposite sides thereof, this ring being carried by and keyed at 32 to a drum 33 ro-V tatable with the driven shaft 2 having a hub 34 mounted thereon, the drum being located in the casing v12. The remainder' of the an outer drum 35 having a hub 35 keyed to theshait 11 to rotate therewith, the drum V,having a fixed abutment 36 on the front side of the single plate 31, and a pressure ring 37-on the rear side of said plate, the ring being shiftable axially. The abutment 36 thrusts against a lock ring 38. Both the abutment and the ring are interlocked with the .drum 35 to rotate` therewith. Also an adjustablek fulcrum ring 39 threads into the drum and is opposed to the pressure ring 37, the fulcrum having an annular fulcrum surface 40. The pressure ring also has unan nular bearing surface 41. i f

42 is a throw-out collar slidable on the shaft 11.

43 is aseries ofoutyvardlv extending levers bearin at their outerends against the annular ulcrumsurface 41 of the `pressure ring fulcruming lnear their outer ends on theannular fulcrum surface and` coactingattheir inner ends with the throw-out collar 42..4 The throw-out collar also has anannularabut ment 44 thereon kformed with StudSAi eX- tending ythrough the web or rear wallof` .the drum 35 in position to be acted upon by the throw-out bearing 45. which slides on the hub f nected-to the web of the drum 35 by tie bolts 48, these springs thrusting at ylike ends against the abutments 47 and attheir other ends against the bottoms of sockets 49 Secured to the throw-out collar 42.

Obviously, during movement of the throw out bearing 45 forwardly or to theright, the kthrow-out collar 42 will be moved to the right through the studs and thus compress the springs and also move the'levers away from their fulorum Surfaces 40 thus releasing the kj 'i` Y, Movement of the throw-out bearingl to the left will permit the springs to moge the throwvout bearing: 42 to the left thus causing the levers to fulcrumon said fulcrum surface 40 and apply pressure to the PIBSSllre ring` and thus engage the clutch. y The throwout bearing 45 is actuated byje fork 50 suitably mounted on a rock sheftl mounted in thecase 12. The rock shaft 5 1 is actuated in any suitable manner from the n front pedal 29 or the shaft 28 on which itis mounted- Th fulcrum ring 39 iadustbl thvwh a hole 61 for a screw driver or other tool inthe web ofthe drum The rin 39 is normally held in its adjusted position Eye sprmgpressed pawl 62 pivoted at 63 .to the innerside ofthe kweb of the drum and coacting with notches 64 in their' The pawl 1s so located that itcan bere y disn v engaged from the notch 64 bythe tool which clutch or the section ofthe clutch associated :is with the propellerv shaft driver 11, comprises `rotate vwith the and driyea shafts' of selves to other gea-rs While'being brought into the gearing, no fly-Wheel momentum is effective on the transmission gearing leither from the frontend or the rear end after the clutches are disengaged and the rgears of the gearing come to a stop without rthe use of brakes which Would `retard their adjusting themmesh.

The usual brake may be used in connection With thel front clutch to retard the rotation of the driven member of the clutch after the clutch is disengaged preliminary to Vgear shifting operation. A What I claim is In a transmissionmechanism, the combination of the driven shaft of a transmission gearing, a second shaft, a clutch-.connecting theshafts, 'whereby the second shaft is nor-v mally driven from `the first-shaft, the vclutch including sections rotatable respectively with the shafts and the section'rotatable WithltheA irst shaft comprising an axially movable sin'- Y gleA platev -and' the other section comprising'a drum mounted on thev second shaft and enclosing the'single plate, a fixed abutment carried by the drum on the frontside of the sinf gle plate, ya pressure ring carried by the drum .on the rear side of the single plate, spring means associated vWith the clutch section on the second shaft for` pressing the pressure ring and the single plate against the fixed abutment and throw-out means for operating the shiftable section against the action of the if s spring means to declutch the sections.

In testimony whereof, I `have* hereunto signed by name at Syracuse, in the county of Onondaga, and State of N eWYYork), this 26th`day1of February, 1926.

GEORGE C. CARHART. 

